Everybody showed great respect to the old doctor, who devoted everything he had to the poor conditions of the local hospital.
A. improving
B. improve
C. to improve
D. being improved
网友回答
(答案→)A. improving
B. improve
C. to improve
D. being improved
解析：考查固定短语。Devote sth to sth/doing sth,花费时间做某事；to是介词。后面接动名词。